Using environment elements to adjust performance of a flexible transistor assembled from opposite polar hydrogels

The performance of flexible electronic devices is often affected by mechanical strains induced by changes in the attached surface affecting the performance. In this study, a hydrogel transistor device is proposed by assembling three different concentrations and types of moisture-generating hydrogels, two pairs of ‘back-to-back’ heterojunctions are constructed, allowing the device to be controlled by environmental factors. The effect of external factors on the electrical and mechanical properties of the device was then investigated, and it was shown that changing the ambient humidity factor allowed the device to generate power (0.5V for a single device) and rectify current (rectification rate of about 4.73), with a 1.5-fold improvement in performance. Adjusting the ambient temperature factor allows for a 27.2 % increase in power and a 30 % increase in current set. In doping experiments, silver nanowires enabled the device to utilise the light factor to achieve a rate of change of resistance of 500. in real circuits, the device was captured EMG signal can be amplified up to 5 times. This study demonstrates a new method to improve the performance of flexible electronic devices by changing environmental factors to balance the performance degradation of flexible transistors due to strain.